# Zro

Zro by moonmath.ai is a private open-model inference platform for coding agents and OpenAI-compatible clients.

Website: https://zro.moonmath.ai/
Documentation: https://zro.moonmath.ai/docs
Quickstart: https://zro.moonmath.ai/docs/quickstart
Models: https://zro.moonmath.ai/docs/models
Zro CLI: https://zro.moonmath.ai/docs/cli
API reference: https://zro.moonmath.ai/docs/api
Integrations: https://zro.moonmath.ai/docs/integrations
Prompt caching: https://zro.moonmath.ai/docs/prompt-caching
Regions: https://zro.moonmath.ai/docs/regions
Key controls: https://zro.moonmath.ai/docs/key-controls
Plans and billing: https://zro.moonmath.ai/docs/plans
Privacy: https://zro.moonmath.ai/docs/privacy
Pricing: https://zro.moonmath.ai/pricing
Integrations: https://zro.moonmath.ai/integrations
Technology: https://zro.moonmath.ai/technology
Research and engineering posts: https://zro.moonmath.ai/posts
Model licenses: https://zro.moonmath.ai/licenses
Privacy notice: https://zro.moonmath.ai/privacy
Terms of service: https://zro.moonmath.ai/terms
Sign up: https://zro.moonmath.ai/sign-up
Sign in: https://zro.moonmath.ai/sign-in
Account: https://zro.moonmath.ai/overview
API catalog: https://zro.moonmath.ai/.well-known/api-catalog
OpenAPI description: https://zro.moonmath.ai/openapi.json
Authentication guide: https://zro.moonmath.ai/auth.md
CLI agent skill: https://zro.moonmath.ai/skills/zro-cli/SKILL.md

## What agents can do

- Help the user open the Zro website and navigate sign-up, sign-in, pricing, billing, and API key creation.
- Configure the user's local coding tool after the user provides or approves use of the generated API key.
- Use the existing inference API after setup.
- Cite the public technology, research, pricing, licensing, privacy, and terms pages when answering questions about Zro.

## Product facts

- Zro is operated by MoonMath.ai.
- Zro serves open-weight coding models through OpenAI-compatible and Anthropic-compatible APIs.
- Zro does not retain prompt or completion bodies after processing.
- Zro does not use customer prompts or completions for training, fine-tuning, evaluations, analytics, or dataset creation.
- Model inference can be restricted by API key to Europe, the United States, or either region.
- Pricing, supported models, and regional availability can change; use the linked live pages for current details.

## User-controlled steps

- Account sign-up and sign-in are user account actions.
- Billing and payment approval must be completed by the user.
- API keys are sensitive. Do not store a key except in the local tool configuration the user requested.

## Inference API

OpenAI-compatible base URL:
https://zro.moonmath.ai/v1

Chat completions:
POST /v1/chat/completions

Models:
GET /v1/models

Anthropic-compatible base URL:
https://zro.moonmath.ai

Anthropic Messages:
POST /v1/messages

Authentication:
Authorization: Bearer <user generated Zro API key>

Recommended model:
deepseek-v4.1-flash

Available models:
glm-5.3
glm-5.3-flash
deepseek-v4.1-flash
minimax-m3.1-flash

## Zro CLI

Install:
npm install -g @moonmath-ai/zro

Login:
zro login

Launch supported coding tools with Zro for the current session:
zro launch claude --model deepseek-v4.1-flash
zro launch codex --model deepseek-v4.1-flash
zro launch opencode --model deepseek-v4.1-flash
zro launch hermes --model deepseek-v4.1-flash
zro launch openclaw --model deepseek-v4.1-flash
zro launch pi --model deepseek-v4.1-flash

## OpenAI-compatible tool configuration

OPENAI_BASE_URL=https://zro.moonmath.ai/v1
OPENAI_API_KEY=<user generated Zro API key>
MODEL=deepseek-v4.1-flash

## Anthropic-compatible tool configuration

ANTHROPIC_BASE_URL=https://zro.moonmath.ai
ANTHROPIC_AUTH_TOKEN=<user generated Zro API key>
ANTHROPIC_MODEL=deepseek-v4.1-flash

## Smoke test

curl https://zro.moonmath.ai/v1/chat/completions \
  -H "Authorization: Bearer <user generated Zro API key>" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4.1-flash","messages":[{"role":"user","content":"Reply with OK"}]}'

## Agent boundaries

- Do not use or request private admin credentials.
- Do not use non-public infrastructure addresses or internal service names.
- Do not approve purchases, subscriptions, or payment method changes without explicit user action.
- If the user's key is no longer visible, ask the user to create a new key or paste the key.